photoshop hangs on save, changes z-order

I'm running cs6 64 on win7 with 24gb of memory and 700gb free disk space.
2 bugs are really annoying.
1)
Several times the background save option has stopped updating and never finishes. Fortunately, I am able to copy and paste the data into another document so at least there is a workaround but when this happens you cannot close the document without terminating it in task manager
2)
This happens quite frequently. CS6 gets in a mode where certain operations such as saving the document causes the program to shift to the back of all other windows. When this happens you need to cycle through your programs with alt-tab or click on the icon in the task bar but it's annoying if (like me) you periodically hit ctrl-s as a shortcut as you are working. It's not related to the keyboard however, because it does the same thing if you save from the file menu. It doesn't always do this but once a day it gets into this state and you have to quit and re-open to stop it.